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CVE-2026-59526 – Unauthenticated SQL Injection – MapSVG WordPress Plugin (≤ 8.14.0)

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Summary

CVE-2026-59526 is a critical unauthenticated SQL injection vulnerability affecting the MapSVG WordPress plugin (versions ≤ 8.14.0), developed by RomanCode. With a CVSS v3.1 base score of 9.3, the flaw allows any remote, unauthenticated attacker to inject malicious SQL commands through the plugin’s publicly accessible REST API endpoints and extract sensitive data directly from the WordPress database. Over 6,600 MapSVG-enabled sites have been identified as internet-facing, making this a high-priority patching event for all affected organizations.

Technical details

  • Root cause: Insufficient input sanitization and improper SQL query preparation in MapSVG’s REST API post-type and distinct-value endpoints (CWE-89 — Improper Neutralization of Special Elements used in SQL Commands).
  • Attack type: Blind SQL Injection (CAPEC-7), exploitable by sending crafted HTTP requests to the plugin’s publicly reachable REST API endpoints.
  • Trigger conditions: No authentication, no user interaction, and no special server configuration are required. The vulnerable endpoints are exposed on any WordPress installation with the MapSVG plugin active.
  • Attack vector: Network-based, zero-click, requiring no privileges whatsoever.
  • Impact: High confidentiality impact — successful exploitation allows an attacker to exfiltrate sensitive data from the WordPress database, including user credentials, session tokens, and site configuration data. The Scope:Changed metric (S:C) indicates that the impact extends beyond the MapSVG plugin itself to the broader WordPress environment. Availability impact is rated Low, reflecting potential disruption caused by resource-intensive injected queries.

Affected software

  • MapSVG WordPress Plugin (free and premium editions), all versions ≤ 8.14.0

Severity

  • CVSS v3.1 Base Score: 9.3 (Critical)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Mitigation and recommended actions

  • Immediate: Update MapSVG to version 8.14.1 or later. The 8.14.1 release explicitly fixes the SQL injection vulnerability by hardening the plugin’s REST API post-type and distinct-value endpoints. Version 8.15.0 is the current release as of this publication.
  • If immediate patching is not feasible, consider temporarily disabling the MapSVG plugin, or applying Web Application Firewall (WAF) rules to block malicious SQL payloads targeting WordPress REST API routes (/wp-json/) until the update can be applied.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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